2014 2.0TDi Crafter Auxiliary Water Pump / Limp Home

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Ed463

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I've got fault code P261A 00, read with VCDS, plus the coil light flashing and it's in limp home mode. Checked everything to the auxiliary pump and everything is ok.
On starting the engine you can feel the pump running. But it stops after around 3 - 4 seconds. The relay opens after maybe 3 to 4 seconds.
At this point I get the coil and eml flashing and Stop Start Error displayed.
It's in constant limp home mode.
I've monitored the voltage at the pump during the few seconds the pump runs. It's healthy at 13V+.
The auxiliary water pump was faulty (open circuit) I've replaced it with a new Bosch pump.
I also had an intermittent fault logged relating to the relay controlling the pump. "Intermittent open circuit". Since clearing this it hasn't returned.
This fault started just after it had it's MOT. I'm wondering if the full throttle smoke test has done something?
But I'm now baffled. No other codes are logged.
I'm a novice with VCDS but I've tried to check the obvious stuff like:
Ambient tempurate.
Atmospheric pressure
Volts
Intake tempurature etc.
Please save me from taking it to the dealer!
 
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Uwe

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Ed463

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Code: 
Tuesday,07,July,2020,11:43:15:34525
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 20.4.1.0 (x64)
Data version: 20200331 DS317.0
www.Ross-Tech.com


VIN: WV1ZZZ2EZF6023526   License Plate: 


Chassis Type: 2E-N/A (2E - VW Crafter Panel Van (LT3 / 2006 > 2016))
Scan: 01 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F A0 A1 A2 A3
          B0 B1 B2 B3 B4 B5 B6 C1
 
VIN: WV1ZZZ2EZF6023526   
-------------------------------------------------------------------------------
Address 01: Engine (J623-CKTB)       Labels:. 03L-906-012-CKT.clb
   Part No SW: 03L 906 012 J    HW: 03L 906 012 A
   Component: R4 2.0l TDI   H26 9977  
   Revision: 72H26---    Serial number: VWXDZ0N1047149
   Coding: 0119401020440D080000
   Shop #: WSC 131071 1023 2097151
   ASAM Dataset: EV_ECM20TDI01103L906012J 002016
   ROD: EV_ECM20TDI01103L906012BS_002.rod
   VCID: 2B52B95E4283EDDE8E-807E

1 Fault Found:
4875 - Coolant Pump 2 
          P261A 00 [175] - Open circuit
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 87454 km
                    Date: 2047.15.31
                    Time: 31:63:63

                    Engine speed: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 21 °C
                    Intake air temperature: 18 °C
                    Ambient air pressure: 980 mbar
                    Voltage terminal 30: 12.460 V
                    Unlearning counter according OBD: 40
                    Coolant temperature at radiator outlet: actual value: 17.4 °C
                    exh.gas recirc.: shut-off conditions-Bits 0-7: 0
                    exh.gas recirc.: shut-off conditions-Bits 0-7: 0
                    exh.gas recirc.: shut-off conditions-Bits 0-7: 0
                    exh.gas recirc.: shut-off conditions-Bits 0-7: 5
                    EGR cooling function: status-Bits 0-7: 0
                    exh.gas recirc. (EGR) cooler pump: specified value: 0.00 %
                    EGR Vacuum Regulator Solen.val.: activation: 100.00 %
                    Exh.gas temp.sen 1: 29.4 °C

Readiness: 1 1 0 0 1 

-------------------------------------------------------------------------------
Address 93: LT3 Immo        Labels: 2E0-905-865-93.clb
   Part No SW: 2E0 905 843 C    HW: 906 900 590 2
   Component: IMMO          1231  1322  
   Revision: 00231000    Serial number: VWXDZ0N1047149
   Shop #: WSC 00000 000 00000
   VCID: 275A456E966BC9BE6A-8072

1 Fault Found:
01176 - Key 
            008 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 94: LT3 Airbag 
   Part No HW: 9069005701
   Shop #: WSC 00117 555 00000
   ASAM Dataset: 3 3332
   ROD: CRFT_AB_3_3331.rod (*)
   VCID: 55A63FA634878B2E08-8000

No fault code found.

-------------------------------------------------------------------------------
Address 96: LT3 Instruments 
   Part No SW: 9069026601    HW: 9069014501
   Shop #: WSC 00000 000 00000
   ASAM Dataset: 32 1056
   ROD: CRFT_KOMBI_32_1056.rod
   VCID: 071A25EEBEABE9BE4A-8052

1 Fault Found:
9100 - Drivetrain CAN: No communication 
            Test Complete - Stored

-------------------------------------------------------------------------------
Address 99: LT3 Ign. Switch 
   Part No HW: 9069005902
   Shop #: WSC 00000 000 00000
   ASAM Dataset: 67 259
   ROD: CRFT_EZS_67_259.rod
   VCID: 55A63FA634878B2E08-8000

No fault code found.

-------------------------------------------------------------------------------
Address 9A: LT3 Central Locks        Labels: 2E0-905-865-9A.clb
   Part No SW: 2E0 905 843 C    HW: 906 900 590 2
   Component: HF-FFB        1231  1322  
   Revision: 00231000    Serial number: 12345678901234
   Shop #: WSC 00000 000 00000
   VCID: 275A456E966BC9BE6A-8072

1 Fault Found:
00171 - Key 1 not learned 
            000 - - - Intermittent

-------------------------------------------------------------------------------
Address 9B: LT3 Driver Door 
   Part No HW: 9069000501
   Shop #: WSC 00000 000 00000
   ASAM Dataset: 33 263
   ROD: CRFT_FTUHR_33_263.rod
   VCID: 55A63FA634878B2E08-8000

No fault code found.

-------------------------------------------------------------------------------
Address B4: LT3 Central Elec. 
   Part No SW: 9069024301    HW: 9069014500
   Shop #: WSC 00000 000 00000
   ASAM Dataset: 33 852
   ROD: CRFT_EZE_33_851.rod (*)
   VCID: 020C34FA9589CC961D-8056

2 Faults Found:
90C1 - Emergency light activated; rotary light switch: implausible condition 
            Test Complete - Stored
90C2 - Emergency light activated; for rotary light switch evaluation: voltage not correct 
            Test Complete - Stored

-------------------------------------------------------------------------------
Address B6: LT3 Steering Wheel 
   Part No SW: 9065402545    HW: 9065402545
   Shop #: WSC 00000 000 00000
   ASAM Dataset: 72 257
   ROD: CRFT_SML_72_257.rod (*)
   VCID: 081826D2B3B5E6C643-805C

No fault code found.

End-------------------------(Elapsed Time: 02:32)--------------------------
 
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Ed463

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Auto Scan Results as Requested

It's picked some additional codes to do with
The instrument cluster
Key and
Emergency light activated which I hadn't found until I did the auto scan. But I don't think they're related to my limp home, stop start, auxilary water pump issue are they?
 
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Ed463

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So I've been trying to figure out what the 90C1 and 90C2 codes mean and I haven't got very far. Could they be related to the Stop Start Error message and responsible for putting it into limp home mode?
Thanks in advance for any help. It's been off the road for 3 weeks+ now:-(
 
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Uwe

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Ed463 said:
So I've been trying to figure out what the 90C1 and 90C2 codes mean and I haven't got very far. Could they be related to the Stop Start Error message and responsible for putting it into limp home mode?
Click to expand...
I doubt it. That appears to be an issue with (or related to) your headlight switch.

-Uwe-
 
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Ed463

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Just an update. The pump runs fine with the engine running and continues to run for a short time after the engine is turned off.

BUT. The code won't re set. The coil light flashes and the eml is on and its still in limp home mode.

The replacement pump is a First Line, not genuine VW but OEM quality.

Does the new pump need to be "coded" so that the ecu recognises it?

Any suggestions gratefully recieved. It's beyond a joke now.
 
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Lukeedwardevans

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C?ID=397140
Morning Ed.

I appreciate its far too late and you've probably already had this vehicle fixed but I thought I'd respond to help anyone else that might have this issue.

The 2.0L CR Crafters built between 2011 and 2016 have 2 Aux water pumps. One is located on the bulkhead, relatively central behind the engine. The second one is tucked away under the slam pannel, towards the top of the radiator, next to the water header tank. This second one is hidden by several pipes that feed the radiator and the header tank.

For me it was this second, hidden pump that was causing the fault code you've detialed above. It also created EGR faults for higher than normal NOX emmisions due to the EGR cooler not being cooled sufficiently by the failing/failed pump.

There's very little information around concerning these Crafters so I hope this helps someone out there.

Regards
 
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